3996penthéō – properly, grieve over a death; (figuratively) to grieve over a personal hope (relationship) that dies, i.e. comes to divine closure ("ends").

3996/penthéō ("mourn over a death") refers to "manifested grief" (WS, 360) – so severe it takes possession of a person and cannot be hid. (This is the same meaning of 3996/penthéō throughout antiquity, cf. LS, R. Trench, Synonyms.)

Mark 16:10V-PPA-DMPGRK:αὐτοῦ γενομένοις πενθοῦσι καὶ κλαίουσινNAS: who had been with Him, while they were mourning and weeping.KJV: with him, as they mourned and wept.INT: him having been [who were] mourning and weeping